Steam-generating plant



E. C'ONNELLEY. STEAM GENEHATING PLANT.

APPLICATION FILED MAH. 6, 1919. 1,331,240. Patented Feb. 17, 1920.

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I I I I l I I l I I I I I l I I I l I I I I I I I I I I I I I I I I I I I I I I l I I I I l I l l I I I I E. CONNELLEY.

lSTEAM GENERATING PLANT.

APPucArloN FILED MAR.6.1919.

1,331,240. Peeented Feb.17,1920.

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I am INV E NTOH E. CONNELLEY.

STEAM GENERATING PLANT.

APPLICATION FILED MAR. 6, I9I9.

Patented Feb. 17, 1920.

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INVENTOR.

WITNESS EDWARD CGNN'ELLEY, 0F. EGUSTCDJ',

STET-GENERATINCT PLANT.

Specification of Letters Patent.

Patented Feb. i7,

An lieation filed March 6, 1319. ferial. lo. 286 9C?.

To all whom t may concern.'

Be it known that I, EDWARD CONNELLEY, acitizen of the United States, residing at Houston, in the county of Harris and State of Texas, have invented new and useful lmproveniente in Steam-Generating Plants, of which the following is a speciiication.

My invention relates to steam generating plants, and has reference both to what is known as the setting or the general re lation of the principal elements, and to the retails thereof.

rl`he object of this invention is to provide a steam generating plant, in which the boiler proper does not contain the furnace proper, but is used entirely to contain the water, steam, and nre-tubes, or other means of bringing the heat into contact with the water. Another object is to provide the furnace proper, with an external circulation of air which not only prevents the heat of the furnace from escaping into Jthe furnace room and maring it uncomfortably warm, but also supplies the furnace wi h preheated air for combustion. `Annet-her object is to lead the products of combustion away from the eX- ternal surface of the boiler proper and as directly as possible into the tire tubes or into contact with equivalent heat transferring means. Other objects will appear hereinafter.

Referring to the accompanying drawings, Figure l is partly a side elevation and partly a longitudinal vertical section of a. steam g nerating plant embodying the principles of my invention; Fig. 2, a section on the line lll-Jl, Fig. l; Fig. 3, a section on the line lll'hlll, Fig. l; Fig. t, a front view of one of the furnace elements with the interior parts omitted; Fig. 5, a vertical longitudinal section of a modiiied form or" my invention; Fig. 6, a transverse section of Fig. 5 on the line VI-Vl; and Fig. a front view of Fig. 5 with the door omitted.

On the drawings, l designates a horizontal cylindrical boiler of the fire-tube type, as shown by the tire-tubes 2 (only a few shown) extending in parallel relation through the same, but I do not limit the boiler to this type. The boiler is supported by the lateral lugs 3 resting ,on the steel or other columns e. The boiler l is shown with capacity only for water, steam, and the tubes, the steam occupying the space above the top row of tubes.

l provide a suitable number of furnaces J ccinnrises two concentric anc .7 spaced apart by the The steel cy inders G A 1 llllllllOllS li'fll'llS- tir ly through arc-shaped spacers S na verse openings 9 extent. e

them. The outer cylinder sts on several sad lles l0 ly .1 g' on a suitable foundation ll.

A vertical n; tal n t rear end f* Oi e- 13 and extel brick 1G. 1%. passagarched passages rear ends of the The inside of lined u ith -bric set in ine forwarde- The arc-shaped spaces between the for- T.' if l -ii bbq viifl. 6 mmf-l 7 n 1Q fx f1 i, aia ends oL t ,e cv. ...incl aio c eseo.

s down to the lower sides of the grates by the channel pieces 22 riveted to the cylinders. @ne or more doors 23 close the front of the furnace units from about the top of the cylinder '.7 to the lower side of the cylinder 6, as shown on Fig. l. A plate covers the front end of the cylinder 'i' and extends up past the top of the cylinder 6 to the lower side of the front of the boiler l. This nlate has the opening 25 to the top of the grate, tire-bon 26, and the opening 27 to the lower side of the grate, or the ash-pit The cylinder 6 is extended forwardly so as to be engaged by the door 23. A. horizontal partition 29 closes the space between the door and the iront plate to prevent from entering the tire-box through the opening 25.

The cylinder 6 terminates in front of the plate 12 in order to provide annular inlet 30 for air. The air in tra eling from the inlet 30 to the opening 27 is caused to travel around the passageway 31 between the cylaassaee 17 to the fire-tubes 2 il C 7 inders 6' and 7 by the use of a baffling means. l prefer the spiral baffles 32 which prevent the air from short-circuiting along the lower side of the passageway 81.

It is seen that the air for combustion with fuel on the grates 19 enters by the inlets 30 and takes spiral lcourses in the passageways 31 and finally enters the ash-pits 28, whence it must, owing to the bridgeavalls 21 closing the spaces at the grates, pass up through the grates and the fuel thereon. The hot products of combustion pass through the arches 15 and up the through which they pass in any preferred ina-nner to the stack not shown. The fire-brick lining 1S would radiate a large amount of hea-t into the boiler-room and make it exceedingly hot, if it were not for the passageway 31 which obstructs the heat and carries it to the lirebox to assist the combustion. The heated gases of combustion do not engage the boiler along its sides, where it would cause it to become burned out.

On Figs. 5, 6, and 7, l show a furnace unit with only a single metal cylinder 35 lined with fire-brick 36 having longitudinal grooves on their outer f aces arranged to register to forni longitudinal air passages 37 to take the place of the air passageway 31' 'of Figs.

1 to 1. The front end of the cylinder 35 is surrounded by the air flue 38 into which the air in the passages 37 enters through the holes 89 in the cylinder. rlihis flue is closed at its forward end down to the level of the grate 1-O by the front wall L11, so that the air will be compelled to enter the furnace chamber through the grate.

1 claim:

1. rEhe combination of a horizontal steamgenerating boiler, a furnace unit external thereto, and means for leading the products of combustion to the heatabsorbing surfaces of the boiler, the said furnace unit comprising a horizontal combustion chamair-jacket to the rear of' and below the' Vfront plate below the grate,

ber, an air-jacket surrounding the same and having provision for admitting air thereto, and means leading the air from the combustion chamber and causing the air to circulate in all portions of the air-jacket.

2. Thecombination of a horizontal steamgenerating boiler, a furnace unit external thereto, and means for leading the products of combustion to the heat-absorbing surfaces of the boiler, the said furnace unit comprising a horizontal combustion charnber, an airfjaclret surrounding the same and having provision for admitting air thereto,`

means leading the air fromthe air-j aelret to the combustion chamber, and spirally arranged baffling means in the airq acliet.

3. The combination of a horizontal boiler having horizontal fire-tubes arranged longitudinally thereof, vertical metal plates extending downwardly from each end of the boiler and at right angles thereto, metal tubular combustion chamber having its ends connected to said end plates, a'grate across the forward portion of the chamber, a bridge-wall cutting'o' the space below the grate from the rear portion of the said chamber, means including a passage through the rear plate for lea-ding the products of combustion to the fire-tubes, a fuel supply passage through the front plate above the grate, an air supply passage through said a tubular member surrounding `the combustion` chamber and spaced therefrom, means leading air to the space between the combustion chamber and the tubular member, and thence to the said passage in the front plate below the grate, and means preventing air from pass`- ing through the passage in the front plate above the grate. Y

Signed at Pittsburgh, Pa., this 3rd day of March, A. D. 1919.

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